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(No Model.)

G. W. WHITE. TELEGRAPHIG SOUNDER.

No. 4215214. Patented Feb. 11,1890..

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GEORGE WASHINGTON WHITE, OF HUNTSVILLE, ALABAMA.

TELEGRAPHIC SOUNDER.

SPECIFICATION forming part of Letters Patent No. 421,214, dated February11, 1890.

Application filed September 24, 1889. Serial No. 324,892. (No modeh) Toall whom it may concern:

Be it known that I, GEORGE WASHINGTON l/VHITE, of Huntsville, in thecounty of Madison and State of Alabama, have invented certain new anduseful Improvements in Telegraphic Sounders; and I do hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, which form part of this specification, inwhich- Figure 1 is a side elevation of my improved sounder, one of theelectro-magnets and its connected parts being removed to more clearlyshow the sounding devices. Fig. 2 is a transverse vertical sectionalview of the same. Fig. 3 is aplan view of the sounder, the upper portionof the soundenbar and frame being broken away to more clearly show themounting thereof; and Fig. 4. is a detail view of the sounding devices.Fig. 5 is a detail View showing the attachment of the frames to thesupporting-post.

This invention relates to improvements in sounders for electrictelegraphs, the object being to provide a device which may be adjustablein such manner as to produce any one of three different sounds, asdesired; and it consists in the construction and novel combination ofparts hereinafter described, ill ustrated in the accompanying drawings,and pointed out in the claims hereto appended.

Referring to the drawings by letters, in which similar letters ofreference designate corresponding parts, A designates thesupporting-base of the device, preferably of a nonconductingmaterialsuch as woodand B designates a supporting-post secured to andrising from said base at a proper point. This base can be omitted andthe post,which supports the entire frame of the device, screwed orsecured to a desk or wherever it is desired to place the sounder.

O is a horizontal U-shaped bar having its legs connected near their endsby a transverse piece, which has a central offset 0 secured by propermeans to the supportingpost a suitable distance above the base.

D D are similar horizontal electro-magnets having cores d situated asuitable distance apart and supported upon and above bar 0 at theirfront ends by stay-straps E, the upper ends of which surround thecorresponding coils, while their lower ends are attached by screws orotherwise to the corresponding legs of the U-shaped bar. The rear endsof the coils are connected by a transverse strap -F, the respective endsof which surround the adjacent coils, and the center of which isconnected by a vertical support f to the bend of the U-shaped bar.

G G are binding-posts of ordinary construction, to which are attachedthe line- Wires 9 g, and which are seated upon the ends of the legs ofbar 0, having insulating-washers g g surrounding their stems both aboveand below said legs. The insulated wire H extends from one of saidbinding-posts to the rear of the adjacent electro-magnet, of which itforms the coil, crosses from the rear end of said magnet to the oppositemagnet, forming the coil thereof, and from the rear of the latter magnetextends to the adjacent bindingpost, so that the circuit is complete.

I is a vertical frame having its front leg secured to the top or head ofthe supportingpost and its rear leg secured to the middle of the bar 0.The upper part of said frame is rectangular and its side bars areprovided with two sets of opposite threaded openings, in the upper setof which engage the headed or thumb screws J, while similar screws Kengage in the lower set of openings. Both sets of screws are engaged byjam-nuts 713' and j, respectively, by means of which nuts, when thepoints of the screws have been properly adjusted, they can be locked andset.

L is a vibratory sounder-bar mounted on a short transverse bar Z, thathas its ends journaled in uprights M M, secured to and rising from thelegs of bar 0. If desired, the ends of shaft Z may be conical and mayhave hearings in conical recesses in the ends of adjustable screws Z,engaging threaded openings in uprights M M. The arm of the sounder-barbelow shaftZ extends to about bar 0, between the legs of which it liesand serves to counterbalance its upper end, which extends nearly to thetop of frame I and stands between the points of the pairs of screws J K,so that when said screws are set properly the said upper end as itvibrates ICO will strike those on opposite sides alternately.

The armature is composed of two opposite pieces M M, each secured to theupper end of the sounder-bar, below screws J K, by means of straps andscrews m,'as shown, and projecting, respectively, on each side of thefront leg of frame I, and thence bending laterally in oppositedirections in front of the ends of the cores (1 d on each side. It isevident that any alternate closing and breaking of the main currentreceived by wire 9 will cause the armature to alternately approach andfall away from the electromagnets, and will consequently vibrate thesounder-bar to which the armature is attached. This vibration will causethe upper part of the sounder-bar to alternately strike the points ofthe screws on opposite sides, and as these screws are adjustable, asdescribed, they may be set so that the said arm will alternately strikeonly the points of the screws J, or only screws K, or one or both ofeach set of screws. The different adjustments of said screws and theirposition on frame I give different tones or sounds when their points arestruck by the sounder-bar. WVhen the points of the upper pair of screwsJ only are struck, the sound is loud, quick, and short; when the pointsof both pairs of screws are struck, the sound is softer and longerextended, and when the points of only the lower screws K are struck thesound is low and not quick. These results arise from the position of thescrews in relation to the pivoted point of the sounder and theirposition on frame 1. These different adjustments of the sounder areuseful where a number of instruments are employed in the same room, aseachpperator can tell his own instrument; also, for distinguishingbetween dot and dash pauses and for office calls.

N is a downwardly-curved bar conn ectedat its ends to the rear ends ofcores 01 outside the coils, and having the rear end of a coiled spring 0secured to its central portion. The said spring curves up over thetransverse strap F, and its front end is connected by a wire P with therear edge of the sounder-bar, the said wire passing through a perforatedinsulating-block p in an opening in the rear leg of frame I. The springpartially balances or cushions the weight of the armature when thesounder-bar and armature are falling away from the magnets and preventstoo much jar. It can be placed in other positions for this purpose, ifdesired.

If desired, the sounder-barmay be provided with a spring for separatingthe armature from the cores quickly; but the weight of the armature isusually sufficient to separate them when the current is stopped.

Having thus described my invention, I claim- 1. The combination, in atelegraphic sounder, of the electro-magnets having their coils connectedand the line-wires having said magnets in circuit, with the two sets ofscrews mounted in a metallic curved frame arranged between the magnetsand adjustable inward and outward, the vibratory sounder-bar having itsupper arm standing between the points of said screws, and the armaturesecured to said sounder-bar, substantially as described.

2. In a telegraphic sounder, the combination of the magnets in the maincircuit, two sets of adjustable screws, the vibratory sounder-bar havingits upper portion standing between the points of the members of each setof screws, the armature connected to said sounder-bar at one side, andthe coiled spring having its inner end connected with the opposite sideof the sounder-bar by a wire and its outer end secured to the centralportion of a bar connecting the rear ends of the cores of the magnets,substantially as specified.

3. The herein-described telegraphic sounder, supported upon a singlepost B and comprising the U-shaped bar 0, the two electromagnetssupported upon said bar, the binding-posts mounted upon the ends of thelegs of said bar and connecting with the magnets, the vertical frame I,with its front leg attached to the post B and its rearleg attached tothe bar 0, the two sets of screws J K, hav-.

ing jam-nuts j is, the sounder-bar mounted on shaft Z, which isjournaled on uprights rising from bar 0, the armature secured to thesounder-bar, the bar N, connecting the rear ends of the cores of themagnets, and the coiled spring 0, having its rear end attached to saidbar and its front end connected to the sounder-bar, all substantially inthe manner and for the purpose specified.

4. The combination,inatelegraphic sounder, of the post B, the horizontalbar C, supported thereon, the frame I, the adjustable screws J Kthereon, the e'lectro-magnets D D on opposite sides of said frame, thevertical sounder-bar L, mounted on adjusting supporting-screws Z Z, andhaving its upper portion vibrating between the points of screws J and K,and the armature secured to said sounder-bar and projecting in front ofthe magnet-cores, the binding-posts, and line and magnet wires, allconstructed substantially as specified.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

GEORGE WASHINGTON WHITE.

Witnesses:

A. J. BENTLEY, ED. BAYLOR STEWART.

